I have the exact opposite problem. I loooove the taste of my organic, extra-virgin olive oil, and if I didn't have to watch my calories I'd drown my food in it!
If you want to add calories but don't like the taste of olive oil, try:
a) buying a really high quality olive oil - you might find you like the flavour if it's a better quality
b) look for oils labelled 'mild' rather than 'robust' (some are also 'fruity' you might like those).
c) mix the olive oil with another oil to cut the flavour - I'd suggest a virgin coconut oil or just plain butter, but grapeseed would be another option. Seriously, if you're just trying to add calories, cut the oil with butter. Saturated fat isn't too big a deal as long as you're also getting your monos and omega-3 polys.
d) speaking of polyunsaturates, if you want to add calories, eat walnuts. They're a great source of omega-3s, and very calorie dense. Plus they're yummy. I crumble them up and add them to things like tuna salad (oooh, add feta too - more calories and more flavour).
damn, getting hungry now....